Hot-air



J. STUBER.

Hot Air Furnace.

Patented May. 1, 1860.

UNITED STATES PATENT OFFICE.

JOHN STUBER, OF UTICA, NEW YORK.

HOT-AIR FURNACE.

Speccation of Letters Patent No. 28,112, dated May 1, 1860.

To all whom it may concern:

Be it known that I, JOHN STUBER, of the city of Utica, in the county of Oneida and State of New York, have invented a new and' tion of the same showing its internal conA struction and arrangement and Fig. 3, eX- hibits an independent attachment or apparatus, for heating cold air in the shortest possible period, and distributing the same through the building at the convenience and will of the occupant.

The base, nre-pot and grate of this furnace are of the form and construction of other furnaces now in use. The independent attachment or heating apparatus consists of a hollow cast iron tube, running through the fire'pot near the top thereof and directly over the fire, branching on the inside, into two pipes or tubes passing around to the opposite of the pot in the form of an ellipsis and there again uniting into one pipe and passing out through the outside of the repot. These tubes or pipes varying in size from three to six inches on the inside of the fire pot, and from siX to twelve inches on the out side, according to the size of the furnace. See Fig. Number. Thecoldair enters the tube or pipe A, and passes through the tubes or pipes a, c, to the pipe or tube B, being heated by passing over the fire and is thence distributed at will.

The furnace is constructed withsiX or more pipes, in the shape of an inverted pear, being small at the bottom and gradually swelling out and increasing in size to the top, and presenting a large surface for the escape of heat-connecting the fire pot with a tunnel shaped extension of radiating surface through which the product of combustion is to pass-situated above the same, the small end down, and that in turn connecting with a smaller extension `of radiating surface, of similar shape, placed within the larger extension and connected therewith at the bottom.

A smoke pipe runs from the center of the top of the lire pot through the center of the extended radiating surfaces, to the top of the furnace, which is closed at the bottom by a closely fitting damper.

The pipes connecting the fire pot and the extension of radiating surface and the eX- tensions themselves being bevel shaped and smallest at the bottom, cleanse themselves from soot and all other impurities.

See Fig. No. 2-(3, O, are the pipes connecting the fire pot with the larger extension of radiating surface. D, D, is the larger extensions of radiating surface and E, E, the smaller; F, F, the smoke pipe; G, g the damper to close the bottom of the smoke pipe; H, H, the re pot; I, I, the independent attachment or heating apparatus.

The lire having been made in the furnace and the damper Gr, g, closed, the heat is forced up to the top of the larger extension of radiating surface D, D, through the pipes C, O,-from thence down the said extension to the smoke pipetand thence through the smoke pipe to the smaller extension of radiating surface E, E.

That I claim as my invention and desire to secure Letters Patent for is- The independent attachment or heating apparatus designated by the letters A, a, a, and B, in Fig. No. 3, the pear shaped pipes O O, and the bevel or tunnel shaped eXtensions of radiating surface D, D, and E, E, in Fig. No. 2, as combined and arranged in the drawing accompanying my application and described in this specification.

J OH. STUBER.

Witnesses WILLIAM R. ANTHONY, ELIAKIM J. SToDDAnD. 

